Which one of the following living organisms completely lacks a cell wall

Which one of the following living organisms completely lacks of cells wall?

Which of the following living organisms completely lack a cell wall?

Which one of the following organisms completely lacks a cell wall?

Which of the following organisms completely lack cell wall, they are the smallest living cells known and can servive without oxygen ?

Which of the following organisms completely lack cell wall, they are the smallest living cells known and can servive without oxygen ?

Which of the following organisms has cell wall ?

Which of the following lack cell wall?

Which one of the following organisms lack muscles and skeleton for movement

Smallest living moneran cells that lack a cell wall are